grep异常但排除特定异常 [英] grep Exception but exclude specific Exception

问题描述

我目前正在匹配文件中的Exception，并在使用前后输出10行：

grep -C 10 [。* Exception

但是现在我想排除某些特定的异常，比如 AAAException 和 BBBException ，我该怎么做？它可以通过

grep -vAAAException| grep -C 10[。* Exception

但是如果在文件中，我有 AAAException 在其他异常的10行内，那行不会包含在输出中，这不是我想要的。我如何不能匹配 AAAException ，但是如果它发生在其他异常的10行内，它仍然会包含在输出中？

$ b $如果你有 grep -P ，你可以指定一个消极的后向断言。

b
$ b

  grep -C 10 -P'\ [。*（？<！AAA | BBB）异常'
  

I am currently matching for "Exception" from a file, and output 10 lines before and after using:

grep -C 10 "[.*Exception"

But now I wish to exclude certain specific Exceptions, say AAAException and BBBException, how could I do it? It can be done via

grep -v "AAAException" | grep -C 10 "[.*Exception"

But if within the file, I have AAAException within 10 lines from some other Exception, that line would not be included in the output, which is not what I want. How can I not match for AAAException, but if it occurred within 10 lines from some other Exception, it will still be included in the output?

解决方案

If you have grep -P you can specify a negative lookbehind assertion.

grep -C 10 -P '\[.*(?<!AAA|BBB)Exception' 

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